I've been using Airbnb for the past month and Kanit's place is without a doubt the best place I've stayed at so far. Excellent location (right next to the BTS train station), wifi (super fast!), and it's a very clean place. Kanit really embodies Airbnb's host values - when we checked in, he gave us a tour of the area, showing us where the street food, 7/11, ramen shops etc are. We also had a late flight on our last day and Kanit let us check out a little bit later. If you're looking for a place to stay in Bangkok, definitely stay at Kanit's!